package string;

public class StringDemo {
    public static void main(String[] args) {
        String s1="123abc";
        String s2="123abc";
        String s3="123abc";
        String s4=new String("123abc");
        System.out.println(s1==s2);
        System.out.println(s1==s3);
        System.out.println(s1==s4);

        String s="123";
        String s5=s+"abc";
        System.out.println(s5==s1);
        String s6="123"+"abc";
        System.out.println(s6==s1);

        String s7="123abc";
        String s8=new String("123abc");
        System.out.println(s7==s8);
        System.out.println(s7.equals(s8));
    }
}
